| Fastighets Ab Strandgränd 2 i Mariehamn | Real estate | 2003 |
| Fastighets Ab Söderkåkar | Real estate | 1983 |
| Fastighets Ab TTT | Real estate | 2007 |
| Fastighets Ab Torggatan 54 | Real estate | 2016 |
| Fastighets Ab Uppgårdsvägen 12 i Mariehamn | Real estate | 1990 |
| Fastighets Ab Utsikten | Real estate | 2010 |
| Fastighets Ab Västerbergen | Real estate | 2007 |
| Fastighets Ab Vågmästaren | Real estate | 2019 |
| Fastighets Ab Ängsvägen 11 | Real estate | 1997 |
| Fastighets Ab Ålands Turisthotell | Real estate | 1992 |
| Fastighets Ab Ålandsvägen 30 | Real estate | 2024 |
| Fastighets Ab Ålandsvägen 48 | Real estate | 2019 |
| Fastighets Ab Åsgården i Jomala | Real estate | 2012 |
| Fastighets Ab Örsundet Södra | Real estate | 2014 |
| Fastighetsaktiebolaget ASP Huset | Real estate | 2004 |
| Fastighetsaktiebolaget JKT Invest | Real estate | 2002 |
| Fastighetsaktiebolaget Klintens Servicecenter i Mariehamn | Real estate | 1998 |
| Fastighetsaktiebolaget Kubiken | Real estate | 2006 |
| Fastighetsaktiebolaget Mejerigatan Hammarland | Real estate | 2013 |
| Fastighetsaktiebolaget Möckelö | Real estate | 1991 |
| Fastighetsaktiebolaget Torggatan 6 i Mariehamn | Real estate | 1991 |
| Fastighetsbyrå Karlsson Ab | Real estate | 2005 |
| Feel Good Åland Ab | Health & social care | 2023 |
| Felicitas Holding Ab | Financial services | 2025 |
| Fennomarc Ab | Financial services | 1987 |
| Festomat, öppet bolag | Hospitality | 2005 |
| Filmhuset Bio Savoy Ab | Information & communication | 2009 |
| Financial Freedom Ab | Professional & scientific | 2006 |
| Finn-Pentagon Holding Ab | Financial services | 2022 |
| Fint på Åland Ab | Administrative & support | 2013 |
| Fiori EJE Ab | Information & communication | 2026 |
| First Principles Ab | Professional & scientific | 2024 |
| FixIt reparationer Ab | Other services | 2025 |
| Fixarn Ab | Other services | 2020 |
| Flanör Ab | Professional & scientific | 2025 |
| Fluid Konsulter AB | Information & communication | 2023 |
| Flygfältets Reseservice Ab Mariehamn | Administrative & support | 2003 |
| Flyttligan Ab | Transport & logistics | 2024 |
| Folkhälsans Allaktivitetshus på Åland Ab | Health & social care | 2001 |
| Food'n'Joy Ab | Professional & scientific | 2007 |
| Fotograf Daniel Eriksson My Eyes Ab | Professional & scientific | 2007 |
| Fotograf Tiina Tahvanainen Ab | Professional & scientific | 2026 |
| Fraenkus ab | Financial services | 1971 |
| Fraktkontor Ab | Financial services | 1942 |
| FramSys Ab | Information & communication | 2025 |
| Franzen Consulting Ab | Health & social care | 2026 |
| Fredsfast Ab | Real estate | 2012 |
| Freemindz Ab | Education | 2020 |
| Friska Bin Ab | Wholesale & retail | 2015 |
| From The Island Ab | Information & communication | 2020 |
| Fuengirola Consulting Ab | Arts & recreation | 1987 |
| FutureYou Ab Åland | Other services | 2020 |
| Fyndet/Olivia Ab | Wholesale & retail | 1976 |
| Fysio Åland Ab | Health & social care | 2018 |
| Försäkringsjuridik N. Grunér Ab | Professional & scientific | 2011 |
| Förvaltningsbolaget D. Widman Ab | Professional & scientific | 2013 |
| G Mattssons Mureri Ab | Construction | 1984 |
| G&B i Jomala Ab | Construction | 1988 |
| Gasexpert Ax AB | Construction | 2018 |
| GE Shipping Ab Ltd | Professional & scientific | 1990 |
| GE-NSB Crew Management Ab Ltd | Education | 2007 |
| GESCO Ab | Real estate | 2002 |
| GJ Custom Ab | Manufacturing | 2025 |
| GM Konsult Åland Ab | Professional & scientific | 2016 |
| GS Maritime Safety Ab | Administrative & support | 2018 |
| GT Holding Ab | Financial services | 2015 |
| Game Room Amusement Ab | Arts & recreation | 2022 |
| Gardomum Ab | Real estate | 2012 |
| Garnkorgen öppet bolag | Wholesale & retail | 2013 |
| Gavi Capital Ab | Real estate | 2013 |
| GeHo Ab | Administrative & support | 2018 |
| GeTa Hollding Ab | Financial services | 2025 |
| Geoplan Projektkompetens Ab | Real estate | 2025 |
| Gerhards Foto Ab | Professional & scientific | 1986 |
| Gester Consulting and Investment Ab | Professional & scientific | 2020 |
| Getur Ab | Real estate | 2008 |
| Gita Salongen Ab | Other services | 2009 |
| Gjut och Betong Investeringsaktiebolag | Financial services | 2016 |
| Glada Muu Ab | Hospitality | 2022 |
| Go Optimal AB OY | Information & communication | 2014 |
| Godby Shipping Ab | Transport & logistics | 1972 |
| Golf Trotters Ab | Arts & recreation | 1989 |
| Goodfood Mariehamn Ab | Wholesale & retail | 2009 |
| Goru Ab | Professional & scientific | 2021 |
| Green Clean Åland Ab | Administrative & support | 2026 |
| Greenstep Åland Ab | Professional & scientific | 2021 |
| Grelsby Kungsgård Ab | Arts & recreation | 2011 |
| Grelsby Strand Ab | Hospitality | 2002 |
| Gripenbergs VVS Ab | Construction | 2013 |
| Gripenbergs entreprenad Ab | Real estate | 2015 |
| Gröna korgen Ab | Wholesale & retail | 2021 |
| GrönaKoppen AB | Arts & recreation | 2021 |
| Grönalund Ab | Financial services | 1988 |
| Guidos Management Service Ab | Professional & scientific | 1984 |
| Guld Viva Ab | Manufacturing | 1990 |
| GullansCare AB | Health & social care | 2018 |
| Gunsta Invest Ab | Real estate | 2009 |
| Gustav Group Ab | Hospitality | 2019 |
| Gästhem Jomala Gård AB | Hospitality | 2024 |
| Görans Fasad & Bygg Ab | Construction | 2012 |